CN220270795U - Test device for testing influence of crankshaft offset on piston friction work - Google Patents
Test device for testing influence of crankshaft offset on piston friction work Download PDFInfo
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- CN220270795U CN220270795U CN202321785202.2U CN202321785202U CN220270795U CN 220270795 U CN220270795 U CN 220270795U CN 202321785202 U CN202321785202 U CN 202321785202U CN 220270795 U CN220270795 U CN 220270795U
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- 238000012360 testing method Methods 0.000 title claims abstract description 43
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- 238000002485 combustion reaction Methods 0.000 description 4
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Abstract
The utility model discloses a test device for testing the influence of crankshaft offset on piston friction work, which comprises a base and an oil pan arranged at one end of the base, wherein the top end of the oil pan is connected with a crankcase, the other end of the base is provided with a dynamometer in transmission connection with a crankshaft in the crankcase, a positioning slide rail is arranged above the crankcase, a cylinder body capable of transversely positioning is arranged on the positioning slide rail, and a piston in the cylinder body is connected with the crankshaft through a connecting rod. The utility model discloses a test device for testing the influence of crankshaft offset on piston friction work, belongs to the technical field of engine assembly tests, and can be used for researching the influence of crankshaft offset on piston stress and friction work so as to find the optimal crankshaft offset position.
Description
Technical Field
The utility model relates to an engine assembly test technology, in particular to a test device for testing the influence of crankshaft offset on piston friction work.
Background
Most of the internal combustion engines at present adopt a structure that a crankshaft faces the axis of a piston, and when the crankshaft and the piston deviate (left deviation or right deviation), the stress conditions of the piston and a connecting rod are changed. To investigate the effect of crankshaft offset on piston stress and its friction work. As disclosed in the patent document CN209557116U, a crank case body with offset crankshaft comprises a crank case body with a cylinder block and a crankshaft installed in the crank case body, the center line of a bearing hole of the crankshaft is offset 3-8 mm downwards compared with the center line of a cylinder hole of the cylinder block; in the solutions disclosed in the above patent documents, it is only proposed to offset the crankshaft by 3-8 mm. However, it is not shown why the offset value of the crankshaft is 3 to 8mm, and it cannot be applied to some engine model assemblies, and it cannot provide an optimal offset position of the crankshaft for the engine assembly.
Therefore, an adjustable crankshaft offset structure is provided to study the influence thereof to find the optimal crankshaft offset position, thereby achieving the purposes of reducing the friction work of the piston and improving the efficiency and the service life of the piston of the internal combustion engine.
Disclosure of Invention
The utility model aims to solve the technical problem of overcoming the defects in the prior art, and aims to provide a test device for testing the influence of crankshaft offset on piston friction work.
In order to achieve the above purpose, the utility model provides a testing device for testing the influence of crankshaft offset on piston friction work, which comprises a base and an oil pan arranged at one end of the base, wherein the top end of the oil pan is connected with a crankcase, the other end of the base is provided with a dynamometer in transmission connection with a crankshaft in the crankcase, a positioning slide rail is arranged above the crankcase, a cylinder body capable of transversely positioning is arranged on the positioning slide rail, and a piston in the cylinder body is connected with the crankshaft through a connecting rod.
Furthermore, a flywheel in transmission connection with the input end of the dynamometer is arranged at the end part of the crankshaft, and a clutch and a gearbox are arranged between the input end of the dynamometer and the flywheel.
Still further, the position-adjusting slide rail is equipped with two with guide rail sliding connection's slide including two guide rails of fixed locating crankcase top and the bottom of cylinder body, be equipped with in the slide with the spout of guide rail looks adaptation, the lateral part threaded connection of slide has the screw extension to the hold-down screw in the spout.
Furthermore, the section of the guide rail is of a trapezoid structure with a wide upper part and a narrow lower part, and the sliding groove is of a trapezoid groove structure matched with the guide rail.
Further, support columns for supporting the two ends of the guide rail are arranged on the base.
Advantageous effects
Compared with the prior art, the testing device for testing the influence of the crankshaft offset on the friction work of the piston has the following beneficial effects:
the test device for testing the influence of the offset of the crankshaft on the friction work of the piston can adjust the relative position between the cylinder hole center line of the cylinder body and the center line of the crankshaft through the positioning slide rail, can adjust the offset position of the crankshaft and the piston, and can research the influence of the offset of the crankshaft on the stress of the piston and the friction work of the piston by recording the displacement of the offset of the crankshaft and corresponding display data on a dynamometer and monitoring the value and the change of the rotation moment on the dynamometer to form a data table so as to find the optimal offset position of the crankshaft, thereby achieving the purposes of reducing the friction work of the piston, improving the efficiency of an internal combustion engine and prolonging the service life of the piston.
Drawings
FIG. 1 is a schematic block diagram of a test apparatus for testing the impact of crankshaft bias on piston friction work in accordance with the present utility model;
fig. 2 is a schematic diagram of the structure of the crankshaft and piston connection in the present utility model.
In the figure: 1. a base; 2. an oil pan; 3. a crankcase; 4. a crankshaft; 5. a dynamometer; 6. a cylinder; 7. a connecting rod; 8. a piston; 9. a flywheel; 10. a guide rail; 11. a slide; 12. and (5) pressing the screw.
Detailed Description
The following detailed description of embodiments of the utility model is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the utility model is not limited to the specific embodiments.
The specific embodiments of the present utility model are as follows: as shown in figures 1-2 of the drawings,
the device for realizing the test device for testing the influence of crankshaft offset on piston friction work comprises a base 1 and an oil pan 2 arranged at one end of the base 1, wherein the top end of the oil pan 2 is connected with a crank case 3, the other end of the base 1 is provided with a dynamometer 5 in transmission connection with a crankshaft 4 in the crank case 3, a positioning slide rail is arranged above the crank case 3, a cylinder body 6 capable of transversely positioning is arranged on the positioning slide rail, and a piston 8 in the cylinder body 6 is connected with the crank case 4 through a connecting rod 7.
In the test device for testing the influence of crankshaft offset on piston friction work, a crankshaft 4 and a cylinder sleeve are respectively arranged on two main bodies of a crankcase 3 and a cylinder body 6, and the relative positions of the crankshaft 4 and the cylinder sleeve are adjustable; the cylinder body 6 is arranged on the positioning slide rail, and the relative position of the cylinder body 6 and the crankshaft 4 can be adjusted at will; the whole engine can be connected with an engine rack, and the crankshaft 4 is dragged to rotate through the dynamometer 5, and the value and the change of the rotation moment are monitored.
The test device for testing the influence of the offset of the crankshaft on the friction work of the piston can flexibly and rapidly adjust the position of the cylinder body 6 through the positioning slide rail, thereby adjusting the displacement of the offset of the crankshaft, and has the advantages of convenient adjustment and high test efficiency.
According to the testing device for testing the influence of the offset of the crankshaft on the friction work of the piston, the crankshaft 4 and the cylinder sleeve are respectively arranged on the two main bodies of the crankcase 3 and the cylinder body 6, the upper and lower relative positions of the crankshaft and the cylinder sleeve can be adjusted according to actual needs, and only the connecting rod 7 with different length and size is needed, so that the flexibility is good, and different testing requirements are met.
In this embodiment, the end of the crankshaft 4 is provided with a flywheel 9 in driving connection with the input end of the dynamometer 5, and a clutch and a gearbox are provided between the input end of the dynamometer 5 and the flywheel 9.
In this embodiment, the positioning slide rail includes two guide rails 10 fixedly arranged above the crankcase 3 and two slide seats 11 slidably connected with the guide rails 10 are arranged at the bottom end of the cylinder body 6, sliding grooves matched with the guide rails 10 are arranged in the slide seats 11, compression screws 12 spirally extending into the sliding grooves are screwed on the side portions of the slide seats 11, and the compression screws 12 can be compressed on the guide rails 10, so that the cylinder body 6 is positioned.
In this embodiment, the cross section of the guide rail 10 is in a trapezoid structure with a wide upper part and a narrow lower part, and the sliding groove is in a trapezoid groove structure matched with the guide rail 10.
The base 1 is provided with support columns for supporting two ends of the guide rail 10, the support columns can be arranged to be of a telescopic rod structure, and the height of the guide rail 10 can be adjusted.
Principle of operation
After the test device is assembled, the crankshaft 4 is driven to rotate by the dynamometer 5, the piston 8 is indirectly driven to slide up and down in the cylinder body 6, the relative position between the cylinder hole center line of the cylinder body 6 and the center line of the crankshaft 4 can be adjusted by the positioning sliding rail, the crankshaft 4 and the piston 8 can deviate (left deviation or right deviation), the stress condition of the piston 8 and the connecting rod 7 can be changed, the acting force and the direction of the piston 8 on the inner wall of the cylinder sleeve of the cylinder body 6 can be changed, the influence of the crankshaft deviation on the friction work of the piston can be judged by the change condition of meter display data on the dynamometer 5, the influence of the crankshaft deviation on the friction work of the piston can be researched by recording the displacement of the crankshaft deviation and corresponding display data on the dynamometer 5 and monitoring the value and the change of the rotation moment on the dynamometer 5 to form a data table, so that the optimal crankshaft deviation position can be found, the piston friction work can be reduced, and the efficiency of the internal combustion engine and the service life of the piston can be improved.
While only the preferred embodiments of the present utility model have been described above, it should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these do not affect the effect of the implementation of the present utility model and the utility of the patent.
Claims (5)
1. The utility model provides a test device of test bent axle biasing to piston friction work influence, its characterized in that, include base (1) and locate oil pan (2) of base (1) one end, the top of oil pan (2) is connected with crankcase (3), the other end of base (1) be equipped with crankshaft (4) transmission in crankcase (3) are connected dynamometer machine (5), the top of crankcase (3) is equipped with the location slide rail, be equipped with cylinder body (6) that can transversely adjust the position on the location slide rail, piston (8) in cylinder body (6) are connected with crankshaft (4) through connecting rod (7).
2. The test device for testing the influence of crankshaft offset on piston friction work according to claim 1, wherein a flywheel (9) in transmission connection with the input end of a dynamometer (5) is arranged at the end part of the crankshaft (4), and a clutch and a gearbox are arranged between the input end of the dynamometer (5) and the flywheel (9).
3. The test device for testing the influence of crankshaft offset on piston friction work according to claim 2, wherein the positioning slide rail comprises two guide rails (10) fixedly arranged above a crank case (3) and two slide seats (11) which are slidably connected with the guide rails (10) are arranged at the bottom end of the cylinder body (6), sliding grooves matched with the guide rails (10) are formed in the slide seats (11), and compression screws (12) which extend into the sliding grooves in a threaded manner are connected to the side portions of the slide seats (11) in a threaded manner.
4. A test device for testing the influence of crankshaft offset on piston friction work according to claim 3, wherein the cross section of the guide rail (10) is of a trapezoid structure with a wide upper part and a narrow lower part, and the sliding groove is of a trapezoid groove structure matched with the guide rail (10).
5. A test device for testing the influence of crankshaft offset on piston friction work according to claim 3, wherein the base (1) is provided with support columns for supporting the two ends of the guide rail (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321785202.2U CN220270795U (en) | 2023-07-07 | 2023-07-07 | Test device for testing influence of crankshaft offset on piston friction work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321785202.2U CN220270795U (en) | 2023-07-07 | 2023-07-07 | Test device for testing influence of crankshaft offset on piston friction work |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220270795U true CN220270795U (en) | 2023-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321785202.2U Active CN220270795U (en) | 2023-07-07 | 2023-07-07 | Test device for testing influence of crankshaft offset on piston friction work |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220270795U (en) |
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2023
- 2023-07-07 CN CN202321785202.2U patent/CN220270795U/en active Active
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